Needle gas-check.



PATENTED OCT. 31. 1905.

W. S. STAPLEY.

NEEDLE GAS CHECK.

urmonmx FILED we. 7, 1905.

ATTORNEY UNITED STATES PATENT OFFICE.

WVILLIAM S. STAPLEY, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE BRIDGEPORT BRASS COMPANY, OF BRIDGEPORT, CONNECTI- OUT, A CORPORATION OF CONNECTICUT.

NEEDLE GAS-CHECK.

Specification of Letters Patent.

Patented Oct. 31, 1905.

Application filed'August 7 1905. Serial No. 272,988-

To all whom it may concern.-

Be it known that 1, WILLIAM S. STAPLEY, a citizen of the United States, residing at Bridgeport, county of Fairfield, State of Connecticut, have invented a new and useful Needle Gas-Check, of which the following is a specification.

This invention has for its object to produce a simple and inexpensive needle gas-check for Bunsen tubes, the principal parts of which may be made from sheet metal, which shall be adapted for natural or artificial gas and,

under a high or low pressure, which will not leak under any pressure, no matter how light the gas may be, which will permit full pressure of the main at the point of outlet, will remain at any adjustment at which it may be placed, and which cannot be affected by the jar of a building and the other conditions of use and will provide ample power to operate the needle, while permitting the parts to be fitted closely, thus avoiding the objections heretofore raised to this class of gas checks or cut-offs.

In order to overcome the various objections to needle gas-checks operated by an outside finger-wheel and to produce a needle-check that will operate easily, will be equally adapted for use with a light or heavy gas, and will be perfectly tight under all the conditions of use, I have devised the novel structure of which the following description, in connection with the accompanying drawings, is a specification, reference characters being used to indicate the several parts.

Figure 1 is a longitudinal section, on an enlarged scale, illustrating the construction and operation of my novel gas-check; Fig. 2, a

plan view of the guide-disk detached; Fig. 3, a plan view of the needle-carrier detached; Fig. 4, an end view of the shaft, pinion, and finger-wheel detached; and Fig. 5 is an enlarged sectional view of the upper end of the shell, showing the taper of the dischargeopening.

1O denotes a Bunsen tube having the usual air-openings 11, and 12 abase havingan opening 13 for the passage of gas. The base is provided with an external screw-thread, which is engaged by a corresponding internal screwthread on a shell A, which is drawn from sheet metal, the lower end of the shell bearing against a shoulder 14 on the base. The

shell is provided near its upper end with an external screw-thread, which is engaged by a corresponding internal screw-thread on the Bunsen tube, the lower end of the tube engaging a shoulder 15 on the shell. The upper end of the shell tapers inward and upward and terminates in a discharge-opening 16.

17 denotes the needle, the upper end of which terminates in a cone 18, which is adapted to pass part way through the dischargeopening, so as to efl'ect an entire or partial shut-ofl of the flow of gas. The inner wall of the discharge-opening tapers upward and inward, as at 19, (see Fig. 5,) but at a greater angle than the taper of the cone, so that the point of engagement of the cone with the discharge-opening is at the outer edge of said gas to reach the outer edge of the dischargeopening and only checking it at that point. Below the cone the needle is polygonal in form, as at 20, and passes through a guide-disk 21, which is secured in the shell by a drive fit, is provided with gas-openings 22 and with acentral polygonal opening 23, through which the needle passes and which holds the needle against rotation, but permits it to slide longitudinally.

B denotes the needle-carrier, which rests upon the base and the edge of which lies between the base and a shoulder 24 on the shell, the shoulder retaining the carrier in place and holding it against any movement except oscillatory movement-that is to say, the parts are not fitted closely enough to interfere with free oscillatory movement of the carrier. The carrier is provided with a central hub 25, which is internally screw-threaded for engagement by a thread 26 on the needle.

27 denotes a series of gas-openings in the carrier arranged in the form of a circle,which are also engaged by a pinion 28, by which the carrier is oscillated, and through the engagement of the thread on the needle with the threaded hub on the carrier the needle is raised and lowered.

It will be understood, of course, that as the needle is held against rotation by the guidedisk rotation of the carrier in either direction must raise or lower the needle throngh the engagement of the threads, thereby cutting off or increasing the discharge of gas into the Bunsen tube through the dischargeopening. The pinion is carried by a horizontal shaft 29, which passes through a stuffing-box 30 in the side of the shell, whereby the possibility of the escape of gas is prevented, and isprovided at its outer end with a tinger-wheel 31 for convenience in operation.

Having thus described my invention, I claim 1. In a device of the character described the combination with a shell having a dischargeopening and a cone-pointed needle adapted to pass partly through said opening and having a screw-thread at its other end, of a needlecarrier having a central hub threaded for engagement by the needle, and means for oscillating the carrier whereby the needle may be raised or lowered and the discharge of gas checked or cut off.

2. In a device of the character described the combination with a shell having a dischargeopening and acone-pointed needle adapted to pass partly through said opening and having a screw-thread at its other end, of a needlecarrier having a central hub threaded for engagement by the needle and a series of openings arranged in circular form and a pinion engaging said openings whereby the carrier may be oscillated to raise or lower the needle.

3. In a device of the character described the combination with a shell whose upper end tapers inward and upward and terminates in a discharge-opening, and a base to which the shell is secured and which is provided with a shoulder 24:, of a needle adapted to pass partly through the discharge-opening and threaded at its lower end, and an oscillatory needlecarrier whose edge lies between shoulder 24 and the base and which is provided with a central hub threaded for engagement by the needle.

4.. In a device of the character described the combination with a shell having a discharge opening and a cone-pointed needle adapted to pass partly through said opening and made polygonal below the cone, of a guide-disk secured in the shell and provided with a polygonal opening through which the needle passes to hold the needle against rotation. and means for moving the needle longitudinally to control the flow of gas.

5. A gas-check comprising a shell having a discharge opening, a cone pointed needle adapted to pass partly through said opening and threaded at its lower end, means for retaining the needle against rotation and an oscillatory carrier having a threaded hub engaging the needle whereby the latter is reciprocated to regulate the flow of gas.

6. A gas-check comprising a shell having a discharge-opening. a conepointed needle adapted to pass partly through said opening and having a screw-thread at its lower end, means for retaining the needle against rotation, a needle-carrier having a hub threaded to engage the needle and a shaft carrying a pinion engaging the carrier, whereby the latter may be oscillated to regulate'the flow of gas.

In testimony whereof Iaflix my signature in presence of two witnesses.

WILLIAM S. STAPLEY.

Witnesses:

A. M. WOOSTER, S. W. ATHERTON. 

